OAuth2, JWT & Mutual TLS (mTLS) Security Architecture
Protect API endpoints and microservice communication using asymmetric cryptography, OAuth2 scopes, and mTLS identity.
💡 Why It Matters
Unprotected APIs expose sensitive customer data, permit token forgery, and allow unauthorized service spoofing.
🌐 Real-World Production Usages & Examples
Stripe API Key Security
Scenario: Authenticating third-party developer payment calls.
Outcome: mTLS + OAuth2 scopes isolate merchant permissions.
✓ When to Use
- •Public mobile/web API authentication.
- •Zero-Trust microservice mesh IPC.
- •Third-party developer app authorization.
✕ When NOT to Use
- •Monolithic single-process local function calls.
🔑 Core Architecture & Rules
- 1Asymmetric JWT Signing: Auth server signs JWT with Private Key; gateway verifies via public JWKS endpoint.
- 2mTLS (Mutual TLS): Both client and server present X.509 TLS certificates to authenticate TCP connections.
- 3Token Revocation: Use short TTLs (15 min) with refresh token rotation to minimize token compromise windows.
⚖️ Architectural Trade-Off Analysis
Stateless Validation vs Instant Revocation
PROJWTs permit fast local gateway signature checks without auth DB lookups.
CONRevoking compromised JWTs requires maintaining a temporary Redis blacklist.
⚠️ Failure Modes & Mitigations
JWT Signature Verification Bypass
Attacker modifies JWT header `alg: none` to bypass validation.
Mitigation: Enforce explicit RS256/ES256 algorithm validation in gateway.
🛠️ Example Usages
Reviewed practical implementations and concrete code walkthroughs for OAuth2, JWT & Mutual TLS (mTLS) Security Architecture.
pattern applicationexecutable tested
Atomic Redis Lua Token Bucket Rate Limiter
Applies the Token Bucket design pattern atomically across distributed gateway instances using Redis Lua scripts.
Lang: luaPractice in scenario →
⬡Explore Related Concepts & Guides
Curated technical reading and direct concept relationships.
📖Core Implementation Guides & Patterns(9 resources)
🔗 Related Concepts
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